阅读说明：本技术 一种基于usb接口的通过式功率测量装置 (Through type power measuring device based on USB interface ) 是由 李金山 苏发 徐达旺 *** 冷朋 刘元商 陈兴腾 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种基于USB接口的通过式功率测量装置,涉及功率测量装置技术领域。该装置包括定向耦合器,定向耦合器上设有两个耦合输出端,每一耦合输出端依次连接衰减器、检波器和通道调理电路,两个通道调理电路汇聚于A/D转换器,A/D转换器连接处理器,处理器上还连接有存储器、并行接口闪存和USB接口收发器,定向耦合器为双定向耦合器,设有耦合器输入端口和耦合器输出端口,耦合器输入端口也作为装置的输入端口,输出端口也作为装置的输出端口,衰减器将耦合输出端输出的功率进一步衰减,使1000W功率经过定向耦合器和衰减器后功率值在-20dBm～-15dBm。该装置通过一个功率探头就实现了台式功率计的所有功能；功耗低,成本低。(The invention discloses a through type power measuring device based on a USB interface, and relates to the technical field of power measuring devices. The device comprises a directional coupler, wherein two coupling output ends are arranged on the directional coupler, each coupling output end is sequentially connected with an attenuator, a detector and a channel conditioning circuit, the two channel conditioning circuits are converged in an A/D converter, the A/D converter is connected with a processor, the processor is also connected with a memory, a parallel interface flash memory and a USB interface transceiver, the directional coupler is a double directional coupler and is provided with a coupler input port and a coupler output port, the coupler input port is also used as an input port of the device, the output port is also used as an output port of the device, the attenuator further attenuates the power output by the coupling output ends, and the power value of 1000W power passing through the directional coupler and the attenuator is within-20 dBm to-15 dBm. The device realizes all functions of the desk type power meter through one power probe; low power consumption and low cost.)

1. A through type power measuring device based on a USB interface is characterized by comprising a directional coupler, wherein two coupling output ends are arranged on the directional coupler, each coupling output end is sequentially connected with an attenuator, a detector and a channel conditioning circuit, the two channel conditioning circuits are converged in an A/D converter, the A/D converter is connected with a processor, and a memory, a parallel interface flash memory and a USB interface transceiver are further connected onto the processor.

2. A USB interface based pass-through power measurement device as claimed in claim 1 wherein the directional coupler is a dual directional coupler having a coupler input port and a coupler output port, the coupler input port also serving as the input port of the device and the output port also serving as the output port of the device.

3. A through type power measuring device based on USB interface as claimed in claim 1 wherein the attenuator further attenuates the power outputted from the coupled output terminal to make the power value of 1000W passing through the directional coupler and the attenuator be-20 dBm to-15 dBm.

4. A USB interface based pass through power measurement device as claimed in claim 1 wherein the detector is a schottky diode based detector and the maximum input power is-15 dBm.

5. A USB interface based pass through power measurement device as claimed in claim 1 wherein the a/D converter is a two input, parallel output, 16 bit a/D converter, operating at 50MHz, and the sampled ADC data is sent to the processor via the parallel interface.

6. A power-through apparatus based on USB interface as claimed in claim 1, wherein the memory is used to store ADC data, after the ADC data is stored in the memory, the corresponding ADC data is read from the storage space of the parallel interface flash memory according to the user's setting, and the power value is calculated.

7. A USB interface based pass-through power measurement device as claimed in claim 1 wherein the parallel interface flash memory is used to store the program running in the processor, the USB interface based pass-through power measurement device is plugged into the USB interface, the program in the parallel interface flash memory is automatically downloaded into the processor, and the program is started to start the power measurement.

8. A USB interface based power through device as claimed in claim 1, wherein the USB interface transceiver is used to communicate between the computer and the processor, and data transmission and command interaction are implemented through the USB interface transceiver.

Technical Field

The invention relates to the technical field of power measuring devices, in particular to a through type power measuring device based on a USB interface.

Background

The through type power measuring device has the characteristics of large bearing power, low insertion loss and the like, and is widely applied to the test of various equipment high power and the on-site maintenance guarantee. A commonly used measuring device is a desk-top through-type power meter.

The desk-top through type power meter is composed of a power probe and a power meter main machine, power coupling, detection and amplification are achieved in the power probe, power signal processing is achieved in the main machine, and the desk-top through type power meter is large in size, large in power and high in cost.

Disclosure of Invention

The invention aims to provide a USB interface-based pass-through power measuring device with a power measuring range of 1W-1000W and a frequency range of 2 MHz-80 MHz, aiming at the defects of the conventional desk-top pass-through power meter.

The invention specifically adopts the following technical scheme:

a through type power measuring device based on a USB interface comprises a directional coupler, wherein two coupling output ends are arranged on the directional coupler, each coupling output end is sequentially connected with an attenuator, a detector and a channel conditioning circuit, the two channel conditioning circuits are converged in an A/D converter, the A/D converter is connected with a processor, and the processor is further connected with a memory, a parallel interface flash memory and a USB interface transceiver.

Preferably, the directional coupler is a dual directional coupler, and is provided with a coupler input port and a coupler output port, the coupler input port also serves as an input port of the apparatus, and the output port also serves as an output port of the apparatus.

Preferably, the attenuator further attenuates the power output by the coupling output end, so that the power value of 1000W of power passing through the directional coupler and the attenuator is-20 dBm to-15 dBm.

Preferably, the detector is a Schottky diode based detector with a maximum input power of-15 dBm.

Preferably, the A/D converter is a two-way input, parallel output, 16-bit A/D converter, the working frequency is 50MHz, and the sampling ADC data is sent to the processor through a parallel interface.

Preferably, the memory is used for storing ADC data, and after the ADC data is stored in the memory, according to user settings, the corresponding ADC data is read from the storage space of the parallel interface flash memory, and calculated to obtain the power value.

Preferably, the parallel interface flash memory is used for storing programs running in the processor, the pass-through power measurement device based on the USB interface is inserted into the USB interface, the programs in the parallel interface flash memory are automatically downloaded into the processor, and the programs are started to start power measurement.

Preferably, the USB interface transceiver is used to implement communication between the computer and the processor, and data transmission and instruction interaction are implemented through the USB interface transceiver.

The invention has the following beneficial effects:

the through type power measuring device based on the USB interface is small in size, and all functions of a desk type power meter can be realized by one power probe; the power consumption is low, the power consumption is only 2W, and is only 1/4 of a desk type power meter; the cost is low, and is only 1/3 of a desk type power meter; the device can be connected to a computer, and can realize power measurement with the maximum power of 1000W, wherein the power measurement range is 1W-1000W, and the frequency range is 2 MHz-80 MHz.

Drawings

Fig. 1 is a schematic block diagram of a pass-through power measurement device based on a USB interface.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

a1: dual directional coupler

P1: device input port

P2: device output port

P3: coupled output terminal of input port

P4: coupled output terminal of output port

A2, A3: attenuator

A4, A5: wave detector

A6, A7: channel conditioning circuit

A8: two-way parallel ADC converter

A9: a processor;

a10: memory device

A11: parallel interface flash memory

A12: USB interface transceiver

As shown in fig. 1, a through type power measurement device based on a USB interface includes a directional coupler, the directional coupler is provided with two coupling output ends, each coupling output end is sequentially connected with an attenuator, a detector and a channel conditioning circuit, the two channel conditioning circuits are converged in an a/D converter, the a/D converter is connected with a processor, the processor is an SoC type ZYNQ series FPGA, and has an FPGA and a Cortex-a9 processor, and the power consumption is about 1.2W. After the ADC is sent into the A9, a memory, a parallel interface flash memory and a USB interface transceiver are connected to the processor which completes all calculation and processing in the A9.

The directional coupler is a dual directional coupler and is provided with a coupler input port and a coupler output port, the coupler input port is also used as an input port of the device, and the output port is also used as an output port of the device. One of the two coupled output ends is a coupled output end of the input port, and the other coupled output end is a coupled output end of the output port.

The attenuator further attenuates the power output by the coupling output end, so that the power value of 1000W of power passing through the directional coupler and the attenuator is between-20 dBm and-15 dBm.

The detector is a Schottky diode-based detector, and the maximum input power is-15 dBm.

The A/D converter is a 16-bit A/D converter with double-channel input and parallel output, the working frequency is 50MHz, and the sampling ADC data is sent to the processor through a parallel interface.

The memory is an SDRAM with a DDR3 interface and is used for storing ADC data, after the ADC data are stored in the memory, corresponding ADC data are read from a storage space of the parallel interface flash memory according to user settings, and calculation is carried out to obtain a power value.

The parallel interface flash memory is used for storing programs running in the processor, the through type power measuring device based on the USB interface is inserted into the USB interface, the programs in the parallel interface flash memory are automatically downloaded into the processor, the programs are started, and power measurement is started.

The USB interface transceiver is used for realizing communication between the computer and the processor, and data transmission and instruction interaction are realized through the USB interface transceiver.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.